-40.2% is the change from 816 to 488
Calculation steps:
[( 488 - 816 ) ÷ 816] x 100 = -40.2%
Formula
Percentage change = [(488 - 816) / 816] x 100
Subtract the new number by the original number
488 - 816 = -328
-328 ÷ 816 = -0.4019607843137255
-0.4019607843137255 x 100 = -40.2%